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Fair Value Measurements (Commercial Aerospace Financing Commitments) (Details) - USD ($) $ in Billions | Sep. 30, 2017 | Dec. 31, 2016
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Commercial Aerospace [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing and other contractual commitments | $ 13.9 | $ 14.4

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- Definition The fair value of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611 + Details
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